fix(ai): move AWS_BEDROCK_SKIP_AUTH inside Node.js environment check

The process.env access was outside the typeof process check, which
would throw in browser environments. Moved inside the Node.js/Bun
block for consistency with other env var access.

Also added changelog entry for #1320 and improved docs clarity.

packages/ai/CHANGELOG.md

@@ -2,6 +2,10 @@
 
 ## [Unreleased]
 
+### Added
+
+- Added `AWS_BEDROCK_SKIP_AUTH` and `AWS_BEDROCK_FORCE_HTTP1` environment variables for connecting to unauthenticated Bedrock proxies ([#1320](https://github.com/badlogic/pi-mono/pull/1320) by [@virtuald](https://github.com/virtuald))
+
 ### Fixed
 
 - Set OpenAI Responses API requests to `store: false` by default to avoid server-side history logging ([#1308](https://github.com/badlogic/pi-mono/issues/1308))

packages/ai/src/providers/amazon-bedrock.ts

@@ -90,18 +90,18 @@ export const streamBedrock: StreamFunction<"bedrock-converse-stream", BedrockOpt
 			profile: options.profile,
 		};
 
-		// Support proxies that don't need authentication
-		if (process.env.AWS_BEDROCK_SKIP_AUTH === "1") {
-			config.credentials = {
-				accessKeyId: "dummy-access-key",
-				secretAccessKey: "dummy-secret-key",
-			};
-		}
-
 		// in Node.js/Bun environment only
 		if (typeof process !== "undefined" && (process.versions?.node || process.versions?.bun)) {
 			config.region = config.region || process.env.AWS_REGION || process.env.AWS_DEFAULT_REGION;
 
+			// Support proxies that don't need authentication
+			if (process.env.AWS_BEDROCK_SKIP_AUTH === "1") {
+				config.credentials = {
+					accessKeyId: "dummy-access-key",
+					secretAccessKey: "dummy-secret-key",
+				};
+			}
+
 			if (
 				process.env.HTTP_PROXY ||
 				process.env.HTTPS_PROXY ||